Examples with Relationship ai.grakn.concept.Relationship used on opensource projects

Example 1 with Relationship

use of ai.grakn.concept.Relationship in project grakn by graknlabs.

the class MatchTest method whenQueryingForAnImplicitRelationById_TheRelationIsReturned.

@Test
public void whenQueryingForAnImplicitRelationById_TheRelationIsReturned() {
    Match match = qb.match(var("x").isa(label(Schema.ImplicitType.HAS.getLabel("name"))));
    Relationship relationship = match.get("x").findAny().get().asRelationship();
    Match queryById = qb.match(var("x").id(relationship.getId()));
    assertThat(queryById, variable(x, contains(MatchableConcept.of(relationship))));
}

Example 2 with Relationship

use of ai.grakn.concept.Relationship in project grakn by graknlabs.

the class SchemaMutationTest method whenChangingTheSuperTypeOfAnEntityTypeWhichHasAResource_EnsureTheResourceIsStillAccessibleViaTheRelationTypeInstances_ByPreventingChange.

@Test
public void whenChangingTheSuperTypeOfAnEntityTypeWhichHasAResource_EnsureTheResourceIsStillAccessibleViaTheRelationTypeInstances_ByPreventingChange() {
    AttributeType<String> name = tx.putAttributeType("name", AttributeType.DataType.STRING);
    // Create a person and allow person to have a name
    EntityType person = tx.putEntityType("person").attribute(name);
    // Create a man which is a person and is therefore allowed to have a name
    EntityType man = tx.putEntityType("man").sup(person);
    RelationshipType has_name = tx.getRelationshipType("@has-name");
    // Create a Man and name him Bob
    Attribute<String> nameBob = name.putAttribute("Bob");
    man.addEntity().attribute(nameBob);
    // Get The Relationship which says that our man is name bob
    Relationship expectedEdge = Iterables.getOnlyElement(has_name.instances().collect(toSet()));
    Role hasNameOwner = tx.getRole("@has-name-owner");
    assertThat(expectedEdge.type().instances().collect(toSet()), hasItem(expectedEdge));
    expectedException.expect(GraknTxOperationException.class);
    expectedException.expectMessage(GraknTxOperationException.changingSuperWillDisconnectRole(person, tx.admin().getMetaEntityType(), hasNameOwner).getMessage());
    // Man is no longer a person and therefore is not allowed to have a name
    man.sup(tx.admin().getMetaEntityType());
}

Example 3 with Relationship

use of ai.grakn.concept.Relationship in project grakn by graknlabs.

the class MigratorTestUtils method getResources.

public static Stream<Attribute> getResources(GraknTx graph, Thing thing, Label label) {
    Role roleOwner = graph.getSchemaConcept(Schema.ImplicitType.HAS_OWNER.getLabel(label));
    Role roleOther = graph.getSchemaConcept(Schema.ImplicitType.HAS_VALUE.getLabel(label));
    Stream<Relationship> relations = thing.relationships(roleOwner);
    return relations.flatMap(r -> r.rolePlayers(roleOther)).map(Concept::asAttribute);
}

Example 4 with Relationship

use of ai.grakn.concept.Relationship in project grakn by graknlabs.

the class EntityTest method whenAddingResourceToAnEntity_EnsureTheImplicitStructureIsCreated.

@Test
public void whenAddingResourceToAnEntity_EnsureTheImplicitStructureIsCreated() {
    Label resourceLabel = Label.of("A Attribute Thing");
    EntityType entityType = tx.putEntityType("A Thing");
    AttributeType<String> attributeType = tx.putAttributeType(resourceLabel, AttributeType.DataType.STRING);
    entityType.attribute(attributeType);
    Entity entity = entityType.addEntity();
    Attribute attribute = attributeType.putAttribute("A attribute thing");
    entity.attribute(attribute);
    Relationship relationship = entity.relationships().iterator().next();
    checkImplicitStructure(attributeType, relationship, entity, Schema.ImplicitType.HAS, Schema.ImplicitType.HAS_OWNER, Schema.ImplicitType.HAS_VALUE);
}

Example 5 with Relationship

use of ai.grakn.concept.Relationship in project grakn by graknlabs.

the class RelationshipTest method whenAddingRolePlayerToRelation_RelationIsExpanded.

@Test
public void whenAddingRolePlayerToRelation_RelationIsExpanded() {
    Relationship relationship = relationshipType.addRelationship();
    Role role = tx.putRole("A role");
    Entity entity1 = type.addEntity();
    relationship.addRolePlayer(role, entity1);
    assertThat(relationship.allRolePlayers().keySet(), containsInAnyOrder(role1, role2, role3, role));
    assertThat(relationship.allRolePlayers().get(role), containsInAnyOrder(entity1));
}